import java.util.HashSet;

/**
 * @classname:HashSetDemo
 * @description:
 * @author: Mr.Z
 * @date: 2020/12/13 19:32
 * @version: 0.1
 * @since:1.8
 */
public class HashSetDemo {
    public static void main(String[] args) {
       HashSet<Integer> set = new HashSet<>(16);
        set.add(100);

        set.add(23);
        set.add(34);
        set.add(12);
        System.out.println(set);
    }
}
